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                    2-3 Module
            
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                    2-7 其它配置项
            
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                    2-8 整体配置结构
            
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                    2-9 多种配置类型
            
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                    2-10 配置总结
            
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                    3-2 使用 TypeScript 语言
            
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                    3-4 使用 SCSS
            
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                    3-5 使用 PostCSS
            
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                    3-6 使用 React 框架
            
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                    3-11 构建同构应用
            
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                    3-15 搭配 Npm Script
            
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                    3-16 检查代码
            
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                    3-18 使用 Webpack Dev Middleware
            
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                    3-19 加载图片
            
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                    3-20 加载SVG
            
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                    3-21 加载 Source Map
            
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                    3-22 实战总结
            
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                    4-2 使用 DllPlugin
            
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                    4-3 使用 HappyPack
            
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                    4-4 使用 ParallelUglifyPlugin
            
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                    4-5 使用自动刷新
            
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                    4-6 开启模块热替换
            
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                    4-7 区分环境
            
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                    4-8 压缩代码
            
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                    4-9 CDN 加速
            
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                    4-10 使用 Tree Shaking
            
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                    4-11 提取公共代码
            
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                    4-12 按需加载
            
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                    4-13 使用 Prepack
            
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                    4-14 开启 Scope Hoisting
            
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                    4-15 输出分析
            
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                    4-16 优化总结
            
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                    第5章 原理
            
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                    5-1 工作原理概括
            
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                    5-2 输出文件分析
            
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                    5-3 编写 Loader
            
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                    5-4 编写 Plugin
            
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                    5-5 调试 Webpack
            
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                    5-6 原理总结
            
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                    常用 Loaders
            
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                    常用 Plugins
            
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                                <h1 id="2-9-&#x591A;&#x79CD;&#x914D;&#x7F6E;&#x7C7B;&#x578B;">2-9 &#x591A;&#x79CD;&#x914D;&#x7F6E;&#x7C7B;&#x578B;</h1>
<p>&#x9664;&#x4E86;&#x901A;&#x8FC7;&#x5BFC;&#x51FA;&#x4E00;&#x4E2A; Object &#x6765;&#x63CF;&#x8FF0; Webpack &#x6240;&#x9700;&#x7684;&#x914D;&#x7F6E;&#x5916;&#xFF0C;&#x8FD8;&#x6709;&#x5176;&#x5B83;&#x66F4;&#x7075;&#x6D3B;&#x7684;&#x65B9;&#x5F0F;&#xFF0C;&#x4EE5;&#x7B80;&#x5316;&#x4E0D;&#x540C;&#x573A;&#x666F;&#x7684;&#x914D;&#x7F6E;&#x3002;
&#x4E0B;&#x9762;&#x6765;&#x4E00;&#x4E00;&#x4ECB;&#x7ECD;&#x5B83;&#x4EEC;&#x3002;</p>
<h2 id="&#x5BFC;&#x51FA;&#x4E00;&#x4E2A;-function">&#x5BFC;&#x51FA;&#x4E00;&#x4E2A; Function</h2>
<p>&#x5728;&#x5927;&#x591A;&#x6570;&#x65F6;&#x5019;&#x4F60;&#x9700;&#x8981;&#x4ECE;&#x540C;&#x4E00;&#x4EFD;&#x6E90;&#x4EE3;&#x7801;&#x4E2D;&#x6784;&#x5EFA;&#x51FA;&#x591A;&#x4EFD;&#x4EE3;&#x7801;&#xFF0C;&#x4F8B;&#x5982;&#x4E00;&#x4EFD;&#x7528;&#x4E8E;&#x5F00;&#x53D1;&#x65F6;&#xFF0C;&#x4E00;&#x4EFD;&#x7528;&#x4E8E;&#x53D1;&#x5E03;&#x5230;&#x7EBF;&#x4E0A;&#x3002;</p>
<p>&#x5982;&#x679C;&#x91C7;&#x7528;&#x5BFC;&#x51FA;&#x4E00;&#x4E2A; Object &#x6765;&#x63CF;&#x8FF0; Webpack &#x6240;&#x9700;&#x7684;&#x914D;&#x7F6E;&#x7684;&#x65B9;&#x6CD5;&#xFF0C;&#x9700;&#x8981;&#x5199;&#x4E24;&#x4E2A;&#x6587;&#x4EF6;&#x3002;
&#x4E00;&#x4E2A;&#x7528;&#x4E8E;&#x5F00;&#x53D1;&#x73AF;&#x5883;&#xFF0C;&#x4E00;&#x4E2A;&#x7528;&#x4E8E;&#x7EBF;&#x4E0A;&#x73AF;&#x5883;&#x3002;&#x518D;&#x5728;&#x542F;&#x52A8;&#x65F6;&#x901A;&#x8FC7; <code>webpack --config webpack.config.js</code> &#x6307;&#x5B9A;&#x4F7F;&#x7528;&#x54EA;&#x4E2A;&#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x3002;</p>
<p>&#x91C7;&#x7528;&#x5BFC;&#x51FA;&#x4E00;&#x4E2A; Function &#x7684;&#x65B9;&#x5F0F;&#xFF0C;&#x80FD;&#x901A;&#x8FC7; JavaScript &#x7075;&#x6D3B;&#x7684;&#x63A7;&#x5236;&#x914D;&#x7F6E;&#xFF0C;&#x505A;&#x5230;&#x53EA;&#x7528;&#x5199;&#x4E00;&#x4E2A;&#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x5C31;&#x80FD;&#x5B8C;&#x6210;&#x4EE5;&#x4E0A;&#x8981;&#x6C42;&#x3002;</p>
<p>&#x5BFC;&#x51FA;&#x4E00;&#x4E2A; Function &#x7684;&#x4F7F;&#x7528;&#x65B9;&#x5F0F;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-keyword">const</span> path = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;path&apos;</span>);
<span class="hljs-keyword">const</span> UglifyJsPlugin = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;webpack/lib/optimize/UglifyJsPlugin&apos;</span>);

<span class="hljs-built_in">module</span>.exports = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">env = {}, argv</span>) </span>{
  <span class="hljs-keyword">const</span> plugins = [];

  <span class="hljs-keyword">const</span> isProduction = env[<span class="hljs-string">&apos;production&apos;</span>];

  <span class="hljs-comment">// &#x5728;&#x751F;&#x6210;&#x73AF;&#x5883;&#x624D;&#x538B;&#x7F29;</span>
  <span class="hljs-keyword">if</span> (isProduction) {
    plugins.push(
      <span class="hljs-comment">// &#x538B;&#x7F29;&#x8F93;&#x51FA;&#x7684; JS &#x4EE3;&#x7801;</span>
      <span class="hljs-keyword">new</span> UglifyJsPlugin()
    )
  }

  <span class="hljs-keyword">return</span> {
    plugins: plugins,
    <span class="hljs-comment">// &#x5728;&#x751F;&#x6210;&#x73AF;&#x5883;&#x4E0D;&#x8F93;&#x51FA; Source Map</span>
    devtool: isProduction ? <span class="hljs-literal">undefined</span> : <span class="hljs-string">&apos;source-map&apos;</span>,
  };
}
</code></pre>
<p>&#x5728;&#x8FD0;&#x884C; Webpack &#x65F6;&#xFF0C;&#x4F1A;&#x7ED9;&#x8FD9;&#x4E2A;&#x51FD;&#x6570;&#x4F20;&#x5165;2&#x4E2A;&#x53C2;&#x6570;&#xFF0C;&#x5206;&#x522B;&#x662F;&#xFF1A;</p>
<ol>
<li><code>env</code>&#xFF1A;&#x5F53;&#x524D;&#x8FD0;&#x884C;&#x65F6;&#x7684; Webpack &#x4E13;&#x5C5E;&#x73AF;&#x5883;&#x53D8;&#x91CF;&#xFF0C;<code>env</code> &#x662F;&#x4E00;&#x4E2A; Object&#x3002;&#x8BFB;&#x53D6;&#x65F6;&#x76F4;&#x63A5;&#x8BBF;&#x95EE; Object &#x7684;&#x5C5E;&#x6027;&#xFF0C;&#x8BBE;&#x7F6E;&#x5B83;&#x9700;&#x8981;&#x5728;&#x542F;&#x52A8; Webpack &#x65F6;&#x5E26;&#x4E0A;&#x53C2;&#x6570;&#x3002;&#x4F8B;&#x5982;&#x542F;&#x52A8;&#x547D;&#x4EE4;&#x662F; <code>webpack --env.production --env.bao=foo</code>&#x65F6;&#xFF0C;&#x5219; <code>env</code> &#x7684;&#x503C;&#x662F; <code>{&quot;production&quot;:&quot;true&quot;,&quot;bao&quot;:&quot;foo&quot;}</code>&#x3002;</li>
<li><code>argv</code>&#xFF1A;&#x4EE3;&#x8868;&#x5728;&#x542F;&#x52A8; Webpack &#x65F6;&#x6240;&#x6709;&#x901A;&#x8FC7;&#x547D;&#x4EE4;&#x884C;&#x4F20;&#x5165;&#x7684;&#x53C2;&#x6570;&#xFF0C;&#x4F8B;&#x5982; <code>--config</code>&#x3001;<code>--env</code>&#x3001;<code>--devtool</code>&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7; <code>webpack -h</code> &#x5217;&#x51FA;&#x6240;&#x6709; Webpack &#x652F;&#x6301;&#x7684;&#x547D;&#x4EE4;&#x884C;&#x53C2;&#x6570;&#x3002;</li>
</ol>
<p>&#x5C31;&#x4EE5;&#x4E0A;&#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x800C;&#x8A00;&#xFF0C;&#x5728;&#x5F00;&#x53D1;&#x65F6;&#x6267;&#x884C;&#x547D;&#x4EE4; <code>webpack</code> &#x6784;&#x5EFA;&#x51FA;&#x65B9;&#x4FBF;&#x8C03;&#x8BD5;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x5728;&#x9700;&#x8981;&#x6784;&#x5EFA;&#x51FA;&#x53D1;&#x5E03;&#x5230;&#x7EBF;&#x4E0A;&#x7684;&#x4EE3;&#x7801;&#x65F6;&#x6267;&#x884C; <code>webpack --env.production</code> &#x6784;&#x5EFA;&#x51FA;&#x538B;&#x7F29;&#x7684;&#x4EE3;&#x7801;&#x3002;</p>
<blockquote>
<p>&#x672C;&#x5B9E;&#x4F8B; <a href="http://webpack.wuhaolin.cn/2-9&#x591A;&#x79CD;&#x914D;&#x7F6E;&#x7C7B;&#x578B;.zip" target="_blank">&#x63D0;&#x4F9B;&#x9879;&#x76EE;&#x5B8C;&#x6574;&#x4EE3;&#x7801;</a></p>
</blockquote>
<h2 id="&#x5BFC;&#x51FA;&#x4E00;&#x4E2A;&#x8FD4;&#x56DE;-promise-&#x7684;&#x51FD;&#x6570;">&#x5BFC;&#x51FA;&#x4E00;&#x4E2A;&#x8FD4;&#x56DE; Promise &#x7684;&#x51FD;&#x6570;</h2>
<p>&#x5728;&#x6709;&#x4E9B;&#x60C5;&#x51B5;&#x4E0B;&#x4F60;&#x4E0D;&#x80FD;&#x4EE5;&#x540C;&#x6B65;&#x7684;&#x65B9;&#x5F0F;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x63CF;&#x8FF0;&#x914D;&#x7F6E;&#x7684; Object&#xFF0C;Webpack &#x8FD8;&#x652F;&#x6301;&#x5BFC;&#x51FA;&#x4E00;&#x4E2A;&#x8FD4;&#x56DE; Promise &#x7684;&#x51FD;&#x6570;&#xFF0C;&#x4F7F;&#x7528;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-built_in">module</span>.exports = <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">env = {}, argv</span>) </span>{
  <span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>((resolve, reject) =&gt; {
    setTimeout(() =&gt; {
      resolve({
        <span class="hljs-comment">// ...</span>
      })
    }, <span class="hljs-number">5000</span>)
  })
}
</code></pre>
<h2 id="&#x5BFC;&#x51FA;&#x591A;&#x4EFD;&#x914D;&#x7F6E;">&#x5BFC;&#x51FA;&#x591A;&#x4EFD;&#x914D;&#x7F6E;</h2>
<p>&#x9664;&#x4E86;&#x53EA;&#x5BFC;&#x51FA;&#x4E00;&#x4EFD;&#x914D;&#x7F6E;&#x5916;&#xFF0C;Webpack &#x8FD8;&#x652F;&#x6301;&#x5BFC;&#x51FA;&#x4E00;&#x4E2A;&#x6570;&#x7EC4;&#xFF0C;&#x6570;&#x7EC4;&#x4E2D;&#x53EF;&#x4EE5;&#x5305;&#x542B;&#x6BCF;&#x4EFD;&#x914D;&#x7F6E;&#xFF0C;&#x5E76;&#x4E14;&#x6BCF;&#x4EFD;&#x914D;&#x7F6E;&#x90FD;&#x4F1A;&#x6267;&#x884C;&#x4E00;&#x904D;&#x6784;&#x5EFA;&#x3002;</p>
<blockquote>
<p>&#x6CE8;&#x610F;&#x672C;&#x7279;&#x6027;&#x4ECE; Webpack 3.1.0 &#x7248;&#x672C;&#x624D;&#x5F00;&#x59CB;&#x652F;&#x6301;&#x3002;</p>
</blockquote>
<p>&#x4F7F;&#x7528;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-built_in">module</span>.exports = [
  <span class="hljs-comment">// &#x91C7;&#x7528; Object &#x63CF;&#x8FF0;&#x7684;&#x4E00;&#x4EFD;&#x914D;&#x7F6E;</span>
  {
    <span class="hljs-comment">// ...</span>
  },
  <span class="hljs-comment">// &#x91C7;&#x7528;&#x51FD;&#x6570;&#x63CF;&#x8FF0;&#x7684;&#x4E00;&#x4EFD;&#x914D;&#x7F6E;</span>
  <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
    <span class="hljs-keyword">return</span> {
      <span class="hljs-comment">// ...</span>
    }
  },
  <span class="hljs-comment">// &#x91C7;&#x7528;&#x5F02;&#x6B65;&#x51FD;&#x6570;&#x63CF;&#x8FF0;&#x7684;&#x4E00;&#x4EFD;&#x914D;&#x7F6E;</span>
  <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
    <span class="hljs-keyword">return</span> <span class="hljs-built_in">Promise</span>();
  }
]
</code></pre>
<p>&#x4EE5;&#x4E0A;&#x914D;&#x7F6E;&#x4F1A;&#x5BFC;&#x81F4; Webpack &#x9488;&#x5BF9;&#x8FD9;&#x4E09;&#x4EFD;&#x914D;&#x7F6E;&#x6267;&#x884C;&#x4E09;&#x6B21;&#x4E0D;&#x540C;&#x7684;&#x6784;&#x5EFA;&#x3002;</p>
<p>&#x8FD9;&#x7279;&#x522B;&#x9002;&#x5408;&#x4E8E;&#x7528; Webpack &#x6784;&#x5EFA;&#x4E00;&#x4E2A;&#x8981;&#x4E0A;&#x4F20;&#x5230; Npm &#x4ED3;&#x5E93;&#x7684;&#x5E93;&#xFF0C;&#x56E0;&#x4E3A;&#x5E93;&#x4E2D;&#x53EF;&#x80FD;&#x9700;&#x8981;&#x5305;&#x542B;&#x591A;&#x79CD;&#x6A21;&#x5757;&#x5316;&#x683C;&#x5F0F;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x4F8B;&#x5982; CommonJS&#x3001;UMD&#x3002;</p>

                                
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